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The Endowment for Human Development
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Germ Layers and Organ Formation


14 days

From The Biology of Prenatal Development.Buy Now

Script: Lebih kurang 2 1/2 minggu, epiblas telah membentuk 3 tisu khas, atau lapisan germa, dipanggil ektoderma, endoderma, dan mesoderma.

Ektoderma membentuk pelbagai struktur termasuk otak, saraf tunjang, saraf, kulit, kuku, dan rambut.

Endoderma menghasilkan lapisan sistem respirasi dan pencernaan, dan menjana sebahagian organ utama seperti hati dan pankreas.

Mesoderma membentuk jantung, ginjal, tulang, rawan, otot, sel darah, dan struktur lain.

All ages referenced to fertilization, not last menstrual period.
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